Linux基础

ifconfig
ip addr
vi /etc/sysconfig/network-scripts/ifcfg-enp0s3
service network restart
yum install net-tools

替换默认源
http://mirrors.163.com/.help/centos.html

cat /etc/redhat-release

yum install wget

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

安装Vim

yum install vim

vim /etc/sysconfig/network-scripts/ifcfg-enp0s3

i->insert
esc->
:q->退出
:wq->保存退出

服务器安装SSH
安装SSH: yum install openssh-server
启动SSH
service sshd start
设置开机运行
chkconfig sshd on

安装ssh客户端：
yum install openssh-clients

查看进程：
ps -ef|grep ssh

远程连接：ssh root@192.168.2.3

SSH config 存放在 ~/.ssh/config
Host test
HostName 192.168.2.3
User test
Port 22

mkdir ~/.ssh
touch config
cat config
host "test"
HostName 192.168.2.3
User root
Port 22

SSH安全免秘钥登录：ssh key

ssh key使用非对称加密方式生成公钥 和 私钥
私钥存放在本地~/.ssh目录
公钥可以对外公开，放在服务器的~/.ssh/authorized_keys

Linux平台生成ssh key
ssh-keygen -t rsa
ssh-keygen -t dsa

touch authorized_keys

ssh-add ~/.ssh/test_rsa